new file mode 100644
--- /dev/null
+++ b/packages/fs/jffs2/current/src/compr_rtime.c
@@ -0,0 +1,108 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2001, 2002 Red Hat, Inc.
+ *
+ * Created by Arjan van de Ven <arjanv@redhat.com>
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ * $Id: compr_rtime.c,v 1.8 2002/01/25 01:49:26 dwmw2 Exp $
+ *
+ *
+ * Very simple lz77-ish encoder.
+ *
+ * Theory of operation: Both encoder and decoder have a list of "last
+ * occurances" for every possible source-value; after sending the
+ * first source-byte, the second byte indicated the "run" length of
+ * matches
+ *
+ * The algorithm is intended to only send "whole bytes", no bit-messing.
+ *
+ */
+
+#ifdef __ECOS
+#include "jffs2port.h"
+#else
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/string.h> 
+#endif
+
+/* _compress returns the compressed size, -1 if bigger */
+int jffs2_rtime_compress(unsigned char *data_in, unsigned char *cpage_out, 
+		   uint32_t *sourcelen, uint32_t *dstlen)
+{
+	int positions[256];
+	int outpos = 0;
+	int pos=0;
+
+	memset(positions,0,sizeof(positions)); 
+	
+	while (pos < (*sourcelen) && outpos <= (*dstlen)-2) {
+		int backpos, runlen=0;
+		unsigned char value;
+		
+		value = data_in[pos];
+
+		cpage_out[outpos++] = data_in[pos++];
+		
+		backpos = positions[value];
+		positions[value]=pos;
+		
+		while ((backpos < pos) && (pos < (*sourcelen)) &&
+		       (data_in[pos]==data_in[backpos++]) && (runlen<255)) {
+			pos++;
+			runlen++;
+		}
+		cpage_out[outpos++] = runlen;
+	}
+
+	if (outpos >= pos) {
+		/* We failed */
+		return -1;
+	}
+	
+	/* Tell the caller how much we managed to compress, and how much space it took */
+	*sourcelen = pos;
+	*dstlen = outpos;
+	return 0;
+}		   
+
+
+void jffs2_rtime_decompress(unsigned char *data_in, unsigned char *cpage_out,
+		      uint32_t srclen, uint32_t destlen)
+{
+	int positions[256];
+	int outpos = 0;
+	int pos=0;
+	
+	memset(positions,0,sizeof(positions)); 
+	
+	while (outpos<destlen) {
+		unsigned char value;
+		int backoffs;
+		int repeat;
+		
+		value = data_in[pos++];
+		cpage_out[outpos++] = value; /* first the verbatim copied byte */
+		repeat = data_in[pos++];
+		backoffs = positions[value];
+		
+		positions[value]=outpos;
+		if (repeat) {
+			if (backoffs + repeat >= outpos) {
+				while(repeat) {
+					cpage_out[outpos++] = cpage_out[backoffs++];
+					repeat--;
+				}
+			} else {
+				memcpy(&cpage_out[outpos],&cpage_out[backoffs],repeat);
+				outpos+=repeat;		
+			}
+		}
+	}		
+}		   
+
+